pickupguy89

Ok so i picked up a 93 eg coupe with b18a1 and jdm head the other day, and the cel is on and throwing 3 and 6 codes.
It doesnt like to be cold started has a hard time staying running
and when i start it, it will start and idle low like it wants to shut off then go back up after its warmed up

3 is MAP sensor

and 6 is ECT (engine coolant temp) sensor.

so a buddy gave me a new MAP sensor and replaced it, unhooked the battery for awhile to reset the code.
still came on as map sensor

and the ect connector was still from a d series so i swapped the connector wired it up and still has code 6

and will still run like before.

anybody know what to do?

wright

I would start by looking at the wiring. I found another thread that a guy had the same problem and it was the wires going to the MAP causing the issue.

Fabrik8

Sounds like a wiring problem. Grab a multimeter and start checking continuity.

ryanherington

Might wanna explain some more, this IS vadriven ya know.


edit: that's what google is for.

pickupguy89

ok well i found the map sensor problem, i found a exact connector just hanging and plugged it in n reset the ecu n its off

now im trying to find out the engine coolant temp code now.

im about to change out the sensors and see if its that.

if anybody has any input on this plz help. thanks

pickupguy89

ok so i found the problems for both.

the dude who did the swap before me had the wrong wires connected to them,
found other connectors hanging out plugged em in and cleared the code and now all good n runing perfect

but......now

i took it out just now drove it no codes, then goosed it to about 5k and the cel came on

i jumped it and code 41 came up, primary 02 sensor heater.

could it be a bad 02 sensor? never came up before when i was hard on it

2egcivics

i have the same problem and its not the bad of a problem to have or car will just runn a lil rich in warm up,thats all

pickupguy89

as in what problem? code 41?

2egcivics

yep i have the same code on my 93 4 door with an ls swap and it just runns a lil rich when its warming up

Fabrik8

The ECU is probably running properly now that you have cleared the faults, which is why the O2 sensor is showing up all of a sudden. You know there were other wiring problems, so I would check the O2 sensor wiring too. If you find out that you need a new sensor, get a OEM Honda sensor instead of an aftermarket sensor from Autozone. I know the Honda sensors are more expensive, but they actually work properly.

The guy you bought it from must have been pretty intelligent if he messed up an LS swap in an EG. It doesn't get any easier than that when it comes to engine swaps.